$1\, kW h =3.6 \times 10^{6}$ joule.
$1\, kW h =3.6 \times 10^{6}$ joule.
True
Similar Questions
Two wires of the same metal have the same length, but cross$-$sections are in the ratio $3: 1 .$ They are joined in series. The resistance of the thicker wire is $10\, ohm.$ The total resistance of the combination will be
Two wires of the same metal have the same length, but cross$-$sections are in the ratio $3: 1 .$ They are joined in series. The resistance of the thicker wire is $10\, ohm.$ The total resistance of the combination will be
A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure. The current recorded in the ammeter will be
A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure. The current recorded in the ammeter will be
$1\, \mu \,A =\ldots \ldots \ldots \,m\, A$
$1\, \mu \,A =\ldots \ldots \ldots \,m\, A$
Which effect of electric current is used in electroplating?
Which effect of electric current is used in electroplating?
$(a)$ What is meant by saying that the potential difference between two points is $1$ volt ?
$(b)$ Why does the connecting cord of an electrical heater not glow while the heating element does ?
$(c)$ Electrical resistivities of some substance at $20^{\circ} C$ are given below
Silver
$1.60 \times 10^{-8}\, \Omega m$
Copper
$1.62 \times 10^{8} \,\Omega$
Tungsten
$5.2 \times 10^{-8} \,\Omega m$
Iron
$10.0 \times 10^{8} \,\Omega m$
Mercury
$94.0 \times 10^{-8}\, \Omega m$
Nichrome
$100 \times 10^{-6}\, \Omega m$
Answer the following questions in relation to them
$(i)$ Among silver and copper which one is better conductor ? Why ?
$(ii)$ Which material would you advise to use in electrical heating device ? Why ?
$(a)$ What is meant by saying that the potential difference between two points is $1$ volt ?
$(b)$ Why does the connecting cord of an electrical heater not glow while the heating element does ?
$(c)$ Electrical resistivities of some substance at $20^{\circ} C$ are given below
| Silver | $1.60 \times 10^{-8}\, \Omega m$ |
| Copper | $1.62 \times 10^{8} \,\Omega$ |
| Tungsten | $5.2 \times 10^{-8} \,\Omega m$ |
| Iron | $10.0 \times 10^{8} \,\Omega m$ |
| Mercury | $94.0 \times 10^{-8}\, \Omega m$ |
| Nichrome | $100 \times 10^{-6}\, \Omega m$ |
Answer the following questions in relation to them
$(i)$ Among silver and copper which one is better conductor ? Why ?
$(ii)$ Which material would you advise to use in electrical heating device ? Why ?